Yoda: We are what they grow beyond.
Kylo Ren: Let the past die. Kill it, if you have to. That's the only way to become what you are meant to be.
Captain Phasma: You were always scum.
Finn: Rebel scum.
Supreme Leader Snoke: You are no Vader. You are just a child in a mask.
Leia: Poe, get your head out of your cockpit!
Snoke: I cannot be betrayed. I cannot be beaten. [Is promptly betrayed and beaten].
Rey: [Seeing Kylo Ren shirtless] Do you have something, a cowl, or something you can put on?
Finn: Let's go, chrome dome.
Poe Dameron: Attention. This is Commander Poe Dameron of the Republic fleet. I have an urgent communique for General Hugs.
General Hux: Patch him through. This is General Hux of the First Order. The Republic is no more. Your fleet are Rebel scum and war criminals. Tell your precious princess there will be no terms, there will be no surrender.
Poe: Hi, I'm holding for General Hugs.
Hux: This is Hux. You and your friends are doomed. We will wipe your filth from the galaxy!
Poe: [Pauses] Okay, I'll hold.
Hux: Hello?
Poe: Hello? Yup, I'm still here.
Hux: Can you - can he hear me?
[A bridge crewman nods.]
Poe: Hugs?
Hux: He can?
Poe: With an 'H'? Skinny guy? Kind of pasty?
Hux: [becoming increasingly annoyed] I can hear you. Can you hear me?
Poe: Look, I can't hold forever. If you reach him, tell him Leia has an urgent message for him...
Peavey: I believe he's tooling with you, sir.
Poe: ...about his mother.
Rey: I need someone to show me my place in all of this.
Luke Skywalker: This is not going to go the way you think.
Luke Skywalker: I only know one truth: It's time for the Jedi... to end.
Luke Skywalker: Breathe. Just breathe. Now reach out. What do you see?
Rey: Light. Darkness. A balance.
Luke Skywalker: It's so much bigger.
Finn: Oh, they hate that ship!
Luke Skywalker: You think what? I'm gonna walk out with a laser sword and face down the entire First Order?! What did you think was gonna happen here? That I came to the most unfindable place in the galaxy for no reason at all? Go away.
Kylo Ren: You come from nothing, you are nothing... but not to me.
Poe: We are the spark, that will light the fire, that will burn the First Order to the ground.
Luke Skywalker: I came to this island to die.
Rey: Master Skywalker, we need you to bring the Jedi back because Kylo Ren is strong with the dark side of the Force. Without the Jedi, we won't stand a chance against him.
Rose: I wish I could put my fist through this whole lousy, beautiful town.
Answer: He knew that his blue lightsaber still existed because Rey brought it to him. He chose to show the blue lightsaber because it belonged to Anakin and Kylo Ren was obsessed with it. He knew that Kylo Ren would be angry at Luke wielding a lightsaber that looked like Anakin's and that rage would help keep him distracted. Here is a quote from Rian Johnson regarding this: "He knows that Kylo's Achilles heel is his rage, and so that's why he kind of makes himself look younger, the way Kylo would've last seen him in their confrontation at the temple, and that's why he decided to bring Kylo's grandfather's lightsaber down there - the lightsaber that Kylo screamed at Rey, 'that's mine, that belongs to me.'"